7-SomeLibraryFunctions

7-SomeLibraryFunctions - afewthings...

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a few things a few things
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#include <cstdlib> rand( );  - "pseudo" random number srand( int seed );  - seed the random number randomNumber = rand( )%10;   // generate random number 0 thru 9
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#include <ctime>  time( 0 );  - returns the number of seconds since Jan 1  1970. I have no idea why. But, not an integer, some  mutant "time" string… so: #include <ctime> #include <cstdlib> srand ( (int) time(0) );       // seed random number generator with time
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Casting int x; double y; x = 10; y = (double)x;
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calling a library function int ranNum; ranNum = rand( ) %2;  // random one or zero The result of the library function is placed  into ranNum.  The rand()%2 function returns a random 0 or 1 as a  “service”.
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actually, time(0) is a "structure" a structure, or "struct" in C++, is a meta-variable,  that contains many variables… one main, and a  number of auxiliary values
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